This manual covers the Triumph T90 motorcycle, a popular model produced between 1963 and 1974. As a mid-range offering within the iconic Bonneville family, the T90 embodies classic British engineering, known for its distinctive character and balanced performance. This 350cc parallel-twin, air-cooled, four-stroke motorcycle was manufactured in Meriden, Coventry, England, and competed effectively in its segment. Its design prioritizes rider engagement and a robust mechanical experience, making it a sought-after machine for enthusiasts and collectors alike.

This comprehensive workshop repair service manual, written in English, provides detailed guidance for owners and technicians. It covers a wide array of essential maintenance procedures, from routine servicing and lubrication to engine and gearbox overhauls. Specific sections address the engine, transmission, chassis, brakes, electrical systems, and fuel system, including carburetor adjustments and ignition timing. Troubleshooting guides and technical specifications are also included, enabling effective diagnosis and repair of common issues and wear-related components, ensuring the longevity and optimal performance of your Triumph T90.